# Deep copy from flow (array of objects) variable to payload oddness?
**URL:** https://discourse.nodered.org/t/deep-copy-from-flow-array-of-objects-variable-to-payload-oddness/65394
**Category:** General
**Created:** [20 July 2022 22:58 UTC](https://discourse.nodered.org/t/deep-copy-from-flow-array-of-objects-variable-to-payload-oddness/65394 "2022-07-20T22:58:26Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)
#### Post date: [20 July 2022 22:58 UTC](https://discourse.nodered.org/t/deep-copy-from-flow-array-of-objects-variable-to-payload-oddness/65394/1 "2022-07-20T22:58:27Z")
Read the description of deep copy on a change node, makes sense, but I think I am seeing odd behavior?
If I inject a change node, that copies a flow (array of objects) variable into payload then sends same to say a UI table, the table never updates.
If I inject a change node, with deep copy checked, that copies a flow (array) variable into payload then sends same to say a UI table, the table updates, as expected.
I have seen this several times now in different flows, that in 2.2.2 worked fine with no deep copy but in 3.0 deep copy checked seems to be required.
The way I read deep copy feature, the table should always update, because payload should always be set, as either a reference to the flow variable, or an explicit copy, of said flow variable, no? Is there some sublime issue or factor here I am missing?
I would create a flow to illustrate, but the issue is so far inconsistent. Some flows work as is, from 2.2.2 to 3.0, others while I have been testing 3.0 today, I have had to check deep copy. This has me scratching my head a bit.
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [18 September 2022 22:59 UTC](https://discourse.nodered.org/t/deep-copy-from-flow-array-of-objects-variable-to-payload-oddness/65394/2 "2022-09-18T22:59:10Z")
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